Measurement

Question 1

The goal of scientific notation is to allow one to work with

Answer 1

Very large or very small #’s

Question 2

If you move the decimal to the right, the exponent is

Answer 2

Negative

Question 3

If you move the decimal to the left, the exponent is

Answer 3

Positive

Question 4

The unit part of a measurement tells

Answer 4

What scale or standard is being used gives the number meaning

Question 5

Significant figures

Answer 5

The number recorded in a measurement fall of the certain #’s plus one uncertain

Question 6

What does significant figures maintain

Answer 6

Lever of accuracy

Question 7

For division and multiplication how many sig figs ?

Answer 7

Round answers to the number of sig figs as the number in the problem with the fewest sig figs

Question 8

Addition and subtraction

Answer 8

Round the number of decimal places as the number in the problem with the fewest decimal places

Question 9

Average atomic mass ( unit= amu)

Answer 9

Weighted average of all the naturally occurring isotopes of an element

Question 10

Avogadro’s number

Answer 10

6.022 times 10^23 number in exactly 1 mole

Question 11

Molar mass

Answer 11

Mass in grams of 1 mole of a pure substance

Question 12

Molecular formula

Answer 12

Actual formula of a compound it may or may not be the simplest ratio of subscripts

Question 13

Empirical formula

Answer 13

Simplest formula which represents the smallest whole number ratio of atoms

Question 14

Can I calculate the molecular formula w:o the molecular or molar mass

Answer 14

No

Question 15

What does then X and Y mean in scientific notation

Answer 15

X- any number between 1 and 9

Y- whole number power of 10 (- o +)